Actuator



FIG. 1 is a perspective view from the front, above and one side of an actuator;

FIG. 2 is a rear elevational view of an actuator;

FIG. 3 is an elevational view of the other side of an actuator;

FIG. 4 is a top plan view of an actuator; and,

FIG. 5 is an underneath plan view of an actuator.

The broken lines in FIGS. 1, 2, 3 and 5 showing a container define environmental subject matter only and form no part of the claimed design. 

The ornamental design for an actuator, as shown and described. 